Looking for PCB Supplier? Get in touch     

Home Publications

Publications - Flexible PCBs (Part III)

Flexible PCBs (Part III) – Design Tips for Effective PCB Manufacturing and to Improve Product Quality

Know Your Application and Frequency of Usage

Before you design a flexible PCB, it is very important that you know what kind of bending flexibility is expected from the PCB in the application and during usage – Dynamic Bend, Semi-Dynamic Bend or Stable Bend. Following is a guide to help you decide this -

Criteria Dynamic Bend Semi-Dynamic Bend Stable Bend
Frequency of Bending Regular Moderate Once or Few Times (e.g. during installation)
No. of Layers 1 Layer (min)
2 Layer (max)
1 Layer (min)
4 Layer (max)
1 Layer (min)
10 Layer (max)
Mask Layer PI Coverlay PI Coverlay or Solder Resist PI Coverlay or Solder Resist
Min. Bending Radius 100-150 times flex PCB thickness More than 20 times flex PCB thickness 10-20 times flex PCB thickness

Conductor Routing – Design Tips


Avoid Right Angle & Hard Corners

Avoid Right Angle & Hard Corners

Maximise Line Widths

Maximise Line Widths

Avoid I-Beam Design

Avoid I-Beam Design

Add Tear Stops

Add Tear Stops

Ground Planes – Design Tips


Convert Continuous Solid Copper into Hatched Pattern

Convert Continuous Solid Copper into Hatched Pattern

Pads, Vias & Coverlay – Design Tips


Anchor Spurs & Add Fillets

Anchor Spurs & Add Fillets

Design Elongated Pads Instead of Traditional Round Pads

Add Coverlay Support to PTH & NPTH holes

Add Coverlay Support to PTH & NPTH holes

Add Coverlay Support to SMD Pad

Add Coverlay Support to SMD Pad

Bending Area – Design Tips


Rout Conductor Traces Perpendicular to Bending Axis

Rout Conductor Traces Perpendicular to Bending Axis

Bending Area – Design Tips


Divide Wide Traces Into Few Narrower Ones

Divide Wide Traces Into Few Narrower Ones

Fill Open Regions with Fake Traces

Fill Open Regions with Fake Traces

Do Not Change Conductor Width Abruptly

Do Not Change Conductor Width Abruptly

Avoid Vias & Component Pads

Avoid Vias & Component Pads

Slots & Cut Out – Design Tips


Slots & Cut Out

If you want to benefit from our monthly Technical Guide, please subscribe here.

PCB Design Tips

PCB Design Tips

When designing a PCB, try to limit the amount of draws you use. Draws use a lot of memory and slow the programming time. Use a flash for pads instead.

More tips

Our Capabilities

We have capability to manufacture Single Sided/Layer (SS), Double Sided/Layer (DS-NPTH & DS-PTH) and MultiLayer (up to 24 layers) PCBs with RoHS as an option.

Need to know more about
our capabilities?

Read more

What our client says?

QualiEco Circuits Limited has the potential to be an excellent supplier to us! We appreciate the quality of service and support that we receive from QualiEco Circuits. Always deliver what is promised.

Susan Chuard
Quality Assurance Supervisor